Vehicle-brake.



No. 883,202. PATENTED MAR. 3l, 1908.

B. A. JOHNSTON. VEHICLE BRAKE.

PPLIO TI N FILED AUG. 1 .19 A A o 6 07 2 SHEETS-SHBET l.

No. 883,22. PATENTBD MAR. 3l, 1908. E. A. JOHNSTON.

VEHICLE BRAKE.

APPLICATION FILED. AUG. 16,1907.

2 SHEETS--SHEET 2.

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miran onirica.

EDWARD A. JOHNSTON,`OF STERLING, ILLINOIS, ASSIGNORTO INTERNATIONAL HARVESTER i COMPANY, A CORPORATION OF NEW JERSEY.

vaincus-naam.

s Specification o! Letters Patent.

Patented March 31, 1908.

Application lied August 16, 1907. Serial No. 388,761.

To all whom it may contaranq Beit known that I, EDWARD A. JOHNSTON,

' .a citizen of the United States, residing at gagement of relativel fixed friction elementsv with said rotatable e ements; and the object of the invention is to provide such friction engaging means with equa1i zin g devices that Wi insure a proper transmisslon of force to the operative parts of the oppositely disposed Y of power friction elements regardless .of any unequal.

wear or adjustment of the same. These objects are attained by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a side view of a vehicle with one of the rear wheels removed and other arts broken away forthe purpose of clearly illustrating the application of my invention thereto; Fi 2 is a rear end view of Fig. 1; Fig. 3 is an e arged detached detail view, partly in section, of part of the friction brake elements` and the controlling means for the same; Fig. 4 vis an end view of vpart of Fig. 3, and illusy'trating the manner of mounting the rotatable friction elements in combination with the relatively fixed members; Fig. 5 is a view similar to Fig. 4; and Fi 6 represents a detail plan view of the e ua izing means.

Referring to the rawings, wherein like reference numerals designate the same parts throughout the several views, 1 represents the` rear road wheels mounted upon a fixed axle 2, and 3 represents the front wheels; 4 is 4 the vehicle body suitably mounted upon the supportin axles, and 5 designates a source om whichmotion is transmitted to the propelling wheels in any preferred manner, as by means of sprocket wheels 6 i hicle.

ably integrai` with said s rocket 'whe vprovided with interior 'ction surfaces; 8

secured to and rotating coaxially with thel rear wheels upon opposite sidesof the ve- '7 represents annular rims that are prefere s andt represents disks fitting within the annular rims and having hub portions 9, by means of which the disks-are secured to the axle 2....

10 represents friction'shoes having their adjaoentu per ends ivotallyconnectedwith the fixed isks'and t eir lower free ends connected by means of tension'sprin 11, said shoes being ada ted to engage riotionaily `with the rims w enmoved 1n a direction in opposition to the force of said springs. To separate the free ends of the shoes and cause their body portions to contact with the rotatable friction rims, there is rovided a twopart rock-shaft 12, having t e outer ends of its parts rotatably mounted in the fixed disks 8 by means of tapered sleeves 13 secured to said shaft and having bearings in said disks;

the inner ends of the parts being journaled 1n a dependin bracket 14 secured to the axle 2;

and secure to the outer ends of the shaft, and engagin with the free ends of the shoes 10, are ou le wiper cams 15 ada ted to separate said free ends of the shoes w en the shaft is rocked in one direction and' to ermit A them to approach each other when sai shaft is rocked in an op osite direction. The shaft is arranged be ow and substantially parallel with the axis of the wheels, and lever arms 16 are secured to each (part upon opposite sides ofthe bracket 14 an extend in opposite directions from the axis of said shaft; and a chain 17 connects the outer ends of said levers.

Mounted upon the vehicle body is lever 18, having a pawl 19 adapted to engage with a toothed sector 20 in a well known Way to hold the lever in adjusted position, and 21 represents a brake controlling rod movable longitudinally and havin its forward end pivotally connected with t y e foot lever at 22, and its rear end movably connected with the chain 17, intermediate its ends, by means of a roller 23 mounted on the rod. The flexible l connection between the ends of the lever arms, 1n combination with the movable roller mounted upon the brake controlling rod, op-

a foot i crates as an equalizing means in transmitting 'sides of the vehicle, or for any slight variation in the adjustment of the associated parts of the mechanism:

i. A mmm insuring, 3 om eminem@ fsb Qppffsi semi which and rotamd@ @axially heewish, reavely ric on element-s mounted upcn the ve hide, nlefns for causing said xed elements to engage Wih said comuable elements, said ne-,agis Qomp'zsng a. 'two-part rockhafthavmgwltps oltr. @ds opmatwely engaging mth Sam )man imm/lon elements, means for mdb ing the paws of said shaft in. opposite di'fecm tions, said means including level' arms se ,owed in@ fh@ miner @dwaalt en ds of said sha-fi; md extending m op cinte dlrecbons {Tom he mis thereof, a 1 exible Gorumecfoiol'l'bel nween the :ms/f ends oie said Mms, a brak@ contollmg member adapted. to be mampu" lated by the opera/tor and havingl one end enl' mgg with smid exble connection intermenaf the @ms the'eof.

EDWARD A. JHNSTCN.

Wtuesses LIORSTER, Gmo. K. .BARTGIL 

